737NG procedure questions
05-13-2011, 10:32 AM
#1
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Joined APC: May 2010
Posts: 11
737NG procedure questions
first off I am not a real pilot, but an avid flight simulator enthusiast that likes to fly as realistically as possible to the real world.
here are some questions on operating the 737NG I have come up with.
1) When do you use Level change and when do you use V nav in a climb
2) do you ever use flaps 2
3) what does flap inhibit normal mean?
4) how often is auto land used
5) do you leave anti ice on for the whole flight?
6) what are MEL issues
7) what are specials
8) Why do the outboard ground spoilers deflect up to a higher angle than the rest of them?
9) do the IRS's have to be aligned every flight?
here are some questions on operating the 737NG I have come up with.
1) When do you use Level change and when do you use V nav in a climb
2) do you ever use flaps 2
3) what does flap inhibit normal mean?
4) how often is auto land used
5) do you leave anti ice on for the whole flight?
6) what are MEL issues
7) what are specials
8) Why do the outboard ground spoilers deflect up to a higher angle than the rest of them?
9) do the IRS's have to be aligned every flight?
05-13-2011, 02:57 PM
#2
Gets Weekends Off
Joined APC: May 2006
Position: 737 CA
Posts: 2,572
Originally Posted by PROFILE CLIMB
first off I am not a real pilot, but an avid flight simulator enthusiast that likes to fly as realistically as possible to the real world.
here are some questions on operating the 737NG I have come up with.
1) When do you use Level change and when do you use V nav in a climb
If you program a VNAV climb in the FMS, use VNAV; otherwise use level change.
2) do you ever use flaps 2
No.
3) what does flap inhibit normal mean?
Normal is the position that will give you warnings "Too low flaps". If you have an abnormal flap landing, not 30-40, you can inhibit the warning with Flap Inhibit.
4) how often is auto land used
Anytime the RVR is below 1200. (runway visual range at 1200 feet) We also try to do one per month just to see if it works properly. They are logged with the company for FAA records.
5) do you leave anti ice on for the whole flight?
No, engine is only used in icing conditions (below 10 degree in visible moisture) and wing anti ice is only used if ice has built up on the leading edge of the wing
6) what are MEL issues
Minimum equipment list issues is a huge topic, too much to discuss here.
7) what are specials
Not sure what you're asking, but our "specials" refer to passenger specials: how many wheelchairs, unaccompanied minors, etc on board. We pass that information along in the inrange report to let the gate know.
8) Why do the outboard ground spoilers deflect up to a higher angle than the rest of them?
There are 6 spoiler panels per wing, 4 are flight spoilers and 2 are ground only spoilers. On the ground: when the speed brake lever is more than 29 degrees, the (flight) ground spoilers move to 52 degrees and the ground only spoilers move to 60 degrees. In the air, with the speed brake lever in "Flight" position, some spoilers move to 20 degrees and some to 24.5 degrees. The NG's with winglets actually move to 9 degrees and 13 degrees. You need less angle in the air than on the ground. Why Boeing came up with which spoiler and angle is a good question.
9) do the IRS's have to be aligned every flight?
Yes, we do a full alignment every leg to realign. There are errors with time.
here are some questions on operating the 737NG I have come up with.
1) When do you use Level change and when do you use V nav in a climb
If you program a VNAV climb in the FMS, use VNAV; otherwise use level change.
2) do you ever use flaps 2
No.
3) what does flap inhibit normal mean?
Normal is the position that will give you warnings "Too low flaps". If you have an abnormal flap landing, not 30-40, you can inhibit the warning with Flap Inhibit.
4) how often is auto land used
Anytime the RVR is below 1200. (runway visual range at 1200 feet) We also try to do one per month just to see if it works properly. They are logged with the company for FAA records.
5) do you leave anti ice on for the whole flight?
No, engine is only used in icing conditions (below 10 degree in visible moisture) and wing anti ice is only used if ice has built up on the leading edge of the wing
6) what are MEL issues
Minimum equipment list issues is a huge topic, too much to discuss here.
7) what are specials
Not sure what you're asking, but our "specials" refer to passenger specials: how many wheelchairs, unaccompanied minors, etc on board. We pass that information along in the inrange report to let the gate know.
8) Why do the outboard ground spoilers deflect up to a higher angle than the rest of them?
There are 6 spoiler panels per wing, 4 are flight spoilers and 2 are ground only spoilers. On the ground: when the speed brake lever is more than 29 degrees, the (flight) ground spoilers move to 52 degrees and the ground only spoilers move to 60 degrees. In the air, with the speed brake lever in "Flight" position, some spoilers move to 20 degrees and some to 24.5 degrees. The NG's with winglets actually move to 9 degrees and 13 degrees. You need less angle in the air than on the ground. Why Boeing came up with which spoiler and angle is a good question.
9) do the IRS's have to be aligned every flight?
Yes, we do a full alignment every leg to realign. There are errors with time.
05-13-2011, 03:38 PM
#3
Gets Weekends Off
Joined APC: Oct 2007
Position: Sr. VP of button pushing
Posts: 2,717
The simple MEL answer is that normally everything on an airplane has to work every flight. The FAA and the aircraft manufacturer understand this isn't going to happen so they publish a Minimum Equipment List saying what can be inop, for how long and what procedures and limitations have be in place to allow the plane to fly.
Say the APU is inop. The MEL will say it has to fixed in 10 days on a B727. If there is only one nav light in a wing tip and it's not working, the MEL will say how many days the plane can fly and also have a limitation that that the plane can not fly at night. If a fuel tank boost pump is inop there will be a time limit, a note that the other boost pumps must work and a requirement to carry extra fuel and treat it as unusable to prevent the remaining pump/pumps from importing during takeoff and landing.
The MEL for a 747 is about 5 inches thick.
Say the APU is inop. The MEL will say it has to fixed in 10 days on a B727. If there is only one nav light in a wing tip and it's not working, the MEL will say how many days the plane can fly and also have a limitation that that the plane can not fly at night. If a fuel tank boost pump is inop there will be a time limit, a note that the other boost pumps must work and a requirement to carry extra fuel and treat it as unusable to prevent the remaining pump/pumps from importing during takeoff and landing.
The MEL for a 747 is about 5 inches thick.
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